Jason "Jay" Kay (born Jason Luís Cheetham; 30 December 1969) is an English singer and songwriter. In 1992, he co-founded the acid jazz and funk band Jamiroquai, and he still serves as their lead vocal
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70e0450bbceac9aebb6e93c4f68016313083fe847ae31058c0e071ab931747e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc4a4387-030a-4617-ad3c-6bf356dea954.json and https://artists.proofprofile.net/proofs/artist/dc4a4387-030a-4617-ad3c-6bf356dea954.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838c0642a9c23d61ef0babb8275b22d5be9f8d353f1b26888c3d04520db9091c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5AB1958852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a51ed43030685518f4e8ed75e680dc9b7c1c314d848812e091c099cb2607bf3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXJMK2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea884d680eb350424f3f8ac1768e272e5d107c9e1261b42d1573ea3442c95904. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2408364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f36ad71c84c7b2ccbde3be8438c2efcaf1575ff872f5b77bc04d93a5b623d4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWDD2421043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832f1bacc306b41fb54d874e38b418fa382529b09f1763607ba301efde108a53. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWDD2287254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314bb7ec100eb18a937968bd2a5ae83c6a931a783a32fd3bb25a326665af8b1a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRRGE2201015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed705a4499858355a656f6f5255325b21ee2b5a0f9612381b8bf84ea4e2327dd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKEZ92300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650b664a008a4f6491720f4f74c7f94ed8459420183cd00bdeab709661fd5524. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKEZ92300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5090d717541c3f904534707e5d517b5b32199f9ffa47ba8c392c114174e932ea. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZEB2321706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e41cbba64ec35a581fc507d6bf93e4f36b4cbf204d96190497b58975d7c8f8d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKEZ92300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94714c88a60ab40102e502a5ded273f73578006692bb669dc9d2ae95daadd73. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZEB2321719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77860cd83220216a0a5df89692cb287bdb66e6a91bddb7f247c87902e5f269a1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ2367369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b51df1fae255f4999beeb7ca2359140fec1f83b88fd2a800f8f3aa0e8417fe1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BX3OL2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b51df1fae255f4999beeb7ca2359140fec1f83b88fd2a800f8f3aa0e8417fe1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BX3OL2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411d58fbd9b9e8365fece428a6229969c6659bea0d399b230953826571a22e56. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5FN2214548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2477dd3b78200bcc50641c0a668381225b1f78db85abc86f660cd9f2d1280125. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCR6R2100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2cea61fcc78ad7b46a8d4b4cab577f6ec8d8b8fee6ebd6d047dcc1187a6728. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXLMW2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4275efb83e9adf777bba2a688a8b13ea499c1724c28f98838e12cb688084710a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:45:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBRKQ2132501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516870754afdb4e72f3cc2d8f47a8d2d013e4beb93cdf806b96c4c4c3f1cd81e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG1796792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef32fbca14a45b50ee10f51798df1b17b7fcae60871fbc7602ec232f32ed9e5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG1796797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10103d53a6876bc0e831db8b9f457fc9c69d2d5d77890a30498ac2c83b5e4a9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:59:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBRKQ2132526.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eba4e1f1a7534eb73a1a5979c16a04d285fe14f1a426908c53e4f61c1e90e69. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBRKQ2132520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ccd0b55e1586c05ea4c03db273b6030f58082cd806de9bdc7e3b9917fda3e9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBRKQ2132522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26fb5a10d83329707762240ed5345250278c5fddcc5e5565901fe71a7feb458. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG1796789.